515663450540 has 96 divisors (see below), whose sum is σ = 1245028057728. Its totient is φ = 175737600000.

The previous prime is 515663450539. The next prime is 515663450557. The reversal of 515663450540 is 45054366515.

It is a junction number, because it is equal to n+sod(n) for n = 515663450491 and 515663450500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76041950 + ... + 76048730.

It is an arithmetic number, because the mean of its divisors is an integer number (12969042268).

Almost surely, 2^515663450540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515663450540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622514028864).

515663450540 is an abundant number, since it is smaller than the sum of its proper divisors (729364607188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

515663450540 is a wasteful number, since it uses less digits than its factorization.

515663450540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9979 (or 9977 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 515663450540 in words is "five hundred fifteen billion, six hundred sixty-three million, four hundred fifty thousand, five hundred forty".